Date: 9/28/17 9:09 am
From: <jbray4913...> [OrangeCountyBirding] <OrangeCountyBirding-noreply...>
Subject: [OrangeCountyBirding] Orange County RBA: September 28, 2017
RBA

* California
* Orange County
* September 28, 2017
* CAOC17.09.28

This is the Orange County, CA weekly Rare Bird Alert (RBA) and local events summary. California Bird Records Committee (CBRC) review species are capitalized and marked with asterisks below. All documentation of review species should be forwarded to the CBRC secretary, Tom Benson, at <secretary...>

BIRDS MENTIONED

Greater White-fronted Goose
*TRICOLORED HERON*
Yellow-crowned Night-Heron
Ruff
Black Tern
Common Tern
Plumbeous Vireo
Purple Martin
Northern Waterthrush
Black-and-white Warbler
Tennessee Warbler
Virginia’s Warbler
Blackburnian Warbler
Chestnut-sided Warbler
Blackpoll Warbler
Prairie Warbler
Green-tailed Towhee
Summer Tanager
Yellow-headed Blackbird

A large flock of GREATER WHITE-FRONTED GEESE were been reported at Seal Beach Naval Weapons Station in Seal Beach, CA on September 21.


A *TRICOLORED HERON* was first spotted on September 25 in the Huntington Beach/Costa Mesa area, flying over Adams Ave. Later that day, it was found and well-photographed along the Santa Ana River between Adams and Hamilton, generally a short distance downstream of the pedestrian walkbridge east of LeBard Park. The bird has not been reported from this location since the morning of September 26. Simultaneously, on the evening of September 25 a Tricolored Heron was also reported at Bolsa Chica Ecological Reserve in Huntington Beach. Sightings at Bolsa Chica continued through September 27, where the bird has been moving around to different areas including the footbridge by the PCH lot, the channel going along “Rabbit Island,” and the “Pocket Pond.” Based on the unlikelihood of one bird repeatedly commuting back and forth between these two areas (which both have plenty of foraging habitat on their own) as well as an analysis of the black portions of the bill in photographs taken of the two birds, it is believed that the Santa Ana River and Bolsa Chica birds are separate individuals and that at least for a short time, TWO Tricolored Herons were present in Orange County. *** Because Tricolored Heron is a CBRC Review Species, please send documentation to the CBRC Secretary Tom Benson at <secretary...>


A YELLOW-CROWNED NIGHT HERON juvenile was reported at Bolsa Chica in Huntington Beach on September 21. This is likely the same bird that has been seen over the past month often found in the “Pocket Pond” to the north of the Wintersburg Channel.


A RUFF that was found on the Santa Ana River on August 16 continued through September 23, most commonly just downstream of the Imperial Highway Bridge.


A BLACK TERN was found at Bolsa Chica Ecological Reserve in Huntington Beach on September 18 and was last seen on September 21. The Hatch Year bird was typically found flying over the "Pocket Pond" with flocks of Forster's Terns.


Large numbers of COMMON TERNS continue to be reported throughout the last week at the Talbert outlet at Huntington State Beach, Newport Beach and Bolsa Chica Wetlands. Most or all of the birds were in first summer plumage.


A PLUMBEOUS VIREO was reported from Laguna Niguel Regional Park in Laguna Niguel on September 24. There were no details about the location of the bird.


A PURPLE MARTIN made a very brief appearance at San Joaquin Wildlife Sanctuary in Irvine on September 23. It was seen flying over the lettered ponds (A-E) and was never refound.


A NORTHERN WATERTHRUSH continued at Huntington Central Park in Huntington Beach through September 24. It was reported from the southeast end of "the island."


Three BLACK-AND-WHITE WARBLERS were reported this week. Gilman Park in Fullerton on September 27 (end of Treeview Ln) Upper Newport - Muth Center in Newport Beach on September 27 and at Huntington Central Park in Huntington Beach on September 24 in “the island” area.

Two TENNESSEE WARBLERS were photographed this week. The first was at Huntington Central Park in Huntington Beach on September 23. It was seen near the restrooms above the amphitheater foraging low in the eucalyptus. The second was found just a few hours later at Canyon Park in Costa Mesa.


Two VIRGINA’S WARBLERS were found on September 27. First one (a male) was seen at Centennial Regional Park in Santa Ana along Fairview in the SE corner of the park. The second bird (a female) was reported at the WEST side of Huntington Central Park in Huntington Beach on September 27. It was seen along the southwest corner of Huntington Lake.


A BLACKBURNIAN WARBLER that was found at Gilman Park in Fullerton on September 17 continued through September 26. It was frequently reported visiting the creek through the park.

A CHESTNUT-SIDED WARBLER was reported from Gilman Park in Fullerton on September 17 and continued through September 23.


Three BLACKPOLL WARBLERS were reported this week. First one was found at Gilman Park in Fullerton on September 20 and continued through September 23. The second bird was photographed at Mile Square Regional Park in Fountain Valley on September 26. It was seen in the “Fertile Crescent” which is in the NE corner of the park where the large crescent of eucalyptus, sycamore and pine trees are near the lake. The third bird was reported at the WEST side of Huntington Central Park in Huntington Beach on September 27. It was seen along the west side of Huntington Lake in the lakeside eucalyptus grove.


A PRAIRIE WARBLER was found at Mile Square Regional Park in Fountain Valley on September 25 and continued through September 27. It’s been seen most reliably in the sycamore trees to the north of the lake and just east of where the trail from palm island exits to the north.


A GREEN-TAILED TOWHEE was reported from the Maple Springs Truck Trail in Silverado Canyon on September 21. It was heard calling with its cat-like mew calls along the side of the road.


Two SUMMER TANAGERS were reported this week. One from Mile Square Regional Park in Fountain Valley on September 25 with absolutely zero documentation. The second reported from Gilman Park in Fullerton on September 17. This was documented as a female-type bird that flew in and started calling just upstream from the bridge near the bathing spot.


A YELLOW-HEADED BLACKBIRD was photographed on a Soccer Field at Shorecliffs Middle School in San Clemente on September 24.




LOCAL EVENTS

UPCOMING EVENTS THAT DO NOT REQUIRE ADVANCE RESERVATIONS

The Monthly Wildlife Walk at the San Joaquin Wildlife Sanctuary will take place on October 7 from 9:00am to 10:30am. Meet at the Audubon House.


The Monthly Bird Walk at the San Joaquin Wildlife Sanctuary will take place on October 8 from 8:00am to 12:00pm. Meet at the Audubon House.



UPCOMING EVENTS THAT REQUIRE ADVANCE RESERVATIONS

The Sea and Sage Audubon fall pelagic trip will take place on September 30 from 6:30am to 3:00pm. Email Nancy Kenyon at <nancykenyon...> to sign up.

The next Upper Newport Bay pontoon boat trip will take place on October 18 from 8:15am to 11:00am. Email Nancy Kenyon at <nancykenyon...> to sign up.

WORKSHOPS AND CLASSES

The Birds of Southern California Introductory Birding Skills Workshop will begin on October 4 and continue through December 14. The weekly classes will be held at Sylvia Gallagher's home in Huntington Beach and will emphasize visual identification for beginning birders. Refer to the following link for enrollment information: http://seaandsageaudubon.org/Classes/2017IntroBirdSkills.pdf.


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The Orange County RBA and events summary is produced weekly by Ryan Winkleman and Jeff Bray in collaboration with Doug Willick. Sightings of rare birds can be posted to the OrangeCountyBirding listserv, emailed directly to Jeff Bray (<jbray4913...>) and/or Ryan Winkleman (<rswinkleman...>), and/or submitted to eBird (http://ebird.org/content/ebird). Any supporting details (descriptions, photos, audio recordings, etc.) of rare sightings that are not already disclosed on the listserv or on eBird should also be emailed to Doug Willick <atdoug.willick...>

Those sightings that are included in this summary generally include those that are considered rare (regionally or seasonally) for Orange County based on "The Birds of Orange County: Status and Distribution" (Hamilton and Willick), "Birds of Southern California" (Garrett and Dunn), and/or more contemporary changes in local or regional status and distribution. Rarities that regularly or seasonally occur at a particular location, such as annually wintering rarities on Seal Beach National Wildlife Refuge, are not included in this digest, but reports of these same species occurring at other, atypical locations throughout the county may be included. All bird reports are vetted to the extent possible prior to each publication, but in the interest of sharing information, the accuracy of any given report cannot always be guaranteed, nor can the presence of any given bird for those who choose to chase after them.


Information on upcoming local events is taken largely from the Sea and Sage Audubon website (http://www.seaandsageaudubon.org/). Sea and Sage Audubon is based out of the Audubon House at the San Joaquin Wildlife Sanctuary in Irvine. They sponsor a number of public field trips, special birding events, conservation lectures, and social gatherings throughout the year. Information regarding upcoming local events should be considered accurate at the time of this posting. However, for the most current information please refer to the field trip list on the Sea and Sage Audubon website athttp://www.seaandsageaudubon.org/FieldTrips/FieldTripSchedule.html. It is also recommended that you refer to that website immediately prior to engaging in any field trip to confirm that trips are still occurring. If you know of additional upcoming events that are not sponsored directly by Sea and Sage Audubon, please email Ryan Winkleman and/or Jeff Bray for inclusion.




 
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